Almost everyone I knew who broke a bone growing up broke them on a trampoline. As an adult, every story I've heard involving someone's kids and a trampoline ended up involving a cast at best.
... And yet. I wonder. I can remember the feeling of freedom and joy in my body as a child, joy in movement itself that I have never recaptured in any meaningful way no matter how I ever tried to motivate myself to exercise...
Swimming is also dangerous, but is considered a very healthy and useful activity and skill. I could see a similar cost/benefit analysis for trampolines and other gymnastic equipment.
Eh, I knew kids (including myself) who broke bones in all sorts of other ways besides trampolines.
However, everyone I know who had a trampoline did break a bone on it.
Some of those ended in permanent, life long injuries. It isn't always just a few months in a cast.
Swimming has more deaths than trampolines do, but not nearly as many serious injuries.
You can take trampolining lessons and to experience that feeling in a much safer environment. Much more expensive though.
Any sort of gymnastics practice, even without a trampoline, gives you a very similar feeling.
Have you tried lifting weights? That freedom of movement is what it feels like to have a higher strength-to-weight ratio.
You can get there surprisingly quickly and casually if you haven't lifted weights in a long time or ever.
Backyard trampolines without nets are particularly dangerous. A gymnasium or trampoline park with in-ground trampolines are my go-to if someone wants to learn how to do tricks.